add validation to accompanying periods

src/Bundle/ChillPersonBundle/migrations/Version20211020131133.php

@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Chill\Migrations\Person;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Validation added to accompanying period resources and accompanying period.
+ */
+final class Version20211020131133 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Validation added to accompanying period resources and accompanying period.';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $this->addSql('CREATE UNIQUE INDEX person_unique ON chill_person_accompanying_period_resource (person_id, accompanyingperiod_id) WHERE person_id IS NOT NULL');
+        $this->addSql('CREATE UNIQUE INDEX thirdparty_unique ON chill_person_accompanying_period_resource (thirdparty_id, accompanyingperiod_id) WHERE thirdparty_id IS NOT NULL');
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('DROP INDEX person_unique');
+        $this->addSql('DROP INDEX thirdparty_unique');
+    }
+}